效果
我使用的是Linux-5.10内核
当时驱动不了屏幕,后来发现驱动程序有点问题,就照着STM32的程序改了一下
路径为linux-5.10/drivers/staging/fbtft/
改好的fb_st7789v程序如下
fb_st7789v.zip
内核配置
Device Drivers --->
【*】 Staging drivers --->
<*> Support for small TFT LCD display modules --->
<*> FB driver for the ST7789V LCD Controller
设备树
路径为linux-5.10/arch/arm/boot/dts/
sun8i-v3s-licheepi-zero-dock.dts
chosen {
/delete-node/ framebuffer@0;
};
&spi0{
status = "okay";
st7789v: st7789v@0{
compatible = "sitronix,st7789v";
reg = <0>;
status = "okay";
spi-max-frequency = <96000000>;
spi-cpol;
spi-cpha;
rotate = <270>;
fps = <60>;
buswidth = <8>;
dc-gpios = <&pio 1 4 GPIO_ACTIVE_HIGH>; // PB4 PB0
reset-gpios = <&pio 1 5 GPIO_ACTIVE_HIGH>; // PB5
//led-gpios = <&pio 0 0 GPIO_ACTIVE_LOW>; // PA0
debug = <0x0>;
};
};
最近编辑记录 资本家大善人 (2021-08-13 22:26:39)
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顺便问一下,那个字体大小怎么改,找不大地方:)
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你好啊,我看了了你的驱动代码,请问
// mdelay(50);
// write_reg(par,0x36,0x00);
// write_reg(par,0x3A,0x05);
// write_reg(par,0xB2,0x0C,0x0C,0x00,0x33,0x33);
// write_reg(par,0xB7,0x35);
// write_reg(par,0xBB,0x19);
// write_reg(par,0xC0,0x2C);
// write_reg(par,0xC2,0x01);
// write_reg(par,0xC3,0x12);
// write_reg(par,0xC4,0x20);
// write_reg(par,0xC6,0x0F);
// write_reg(par,0xD0,0xA4,0xA1);
// write_reg(par,0xE0,0xD0,0x04,0x0D,0x11,0x13,0x2B,0x3F,0x54,0x4C,0x18,0x0D,0x0B,0x1F,0x23);
// write_reg(par,0xE1,0xD0,0x04,0x0C,0x11,0x13,0x2C,0x3F,0x44,0x51,0x2F,0x1F,0x1F,0x20,0x23);
// write_reg(par,0x21);
// write_reg(par,0x11);
// mdelay(50);
// write_reg(par,0x29);
// mdelay(200);
// return 0;
用这串代码初始化 你那边是遇到的什么问题呢,我是用这串代码初始化 结果黑屏了。
之前我用ILI9341走FB驱动 ,字体网上下一个字体库就行了。我有现成的
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@thanksgivingday
我用原驱动代码,屏幕亮不了(320*240 2寸st7789SPI屏幕)
与STM32的程序对照,发现两边初始化代码不一样,改成STM32的就成功点亮了
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@thanksgivingday
我用原驱动代码,屏幕亮不了(320*240 2寸st7789SPI屏幕)
与STM32的程序对照,发现两边初始化代码不一样,改成STM32的就成功点亮了
我也用了STM32的初始化代码还是不行 - -
你贴出来的代码是你最后成功的代码吗
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@thanksgivingday
// SPDX-License-Identifier: GPL-2.0+
/*
* FB driver for the ST7789V LCD Controller
*
* Copyright (C) 2015 Dennis Menschel
*/
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <video/mipi_display.h>
#include "fbtft.h"
#define DRVNAME "fb_st7789v"
#define DEFAULT_GAMMA \
"70 2C 2E 15 10 09 48 33 53 0B 19 18 20 25\n" \
"70 2C 2E 15 10 09 48 33 53 0B 19 18 20 25"
#define HSD20_IPS_GAMMA \
"D0 05 0A 09 08 05 2E 44 45 0F 17 16 2B 33\n" \
"D0 05 0A 09 08 05 2E 43 45 0F 16 16 2B 33"
#define HSD20_IPS 1
/**
* enum st7789v_command - ST7789V display controller commands
*
* @PORCTRL: porch setting
* @GCTRL: gate control
* @VCOMS: VCOM setting
* @VDVVRHEN: VDV and VRH command enable
* @VRHS: VRH set
* @VDVS: VDV set
* @VCMOFSET: VCOM offset set
* @PWCTRL1: power control 1
* @PVGAMCTRL: positive voltage gamma control
* @NVGAMCTRL: negative voltage gamma control
*
* The command names are the same as those found in the datasheet to ease
* looking up their semantics and usage.
*
* Note that the ST7789V display controller offers quite a few more commands
* which have been omitted from this list as they are not used at the moment.
* Furthermore, commands that are compliant with the MIPI DCS have been left
* out as well to avoid duplicate entries.
*/
enum st7789v_command {
PORCTRL = 0xB2,
GCTRL = 0xB7,
VCOMS = 0xBB,
VDVVRHEN = 0xC2,
VRHS = 0xC3,
VDVS = 0xC4,
VCMOFSET = 0xC5,
PWCTRL1 = 0xD0,
PVGAMCTRL = 0xE0,
NVGAMCTRL = 0xE1,
};
#define MADCTL_BGR BIT(3) /* bitmask for RGB/BGR order */
#define MADCTL_MV BIT(5) /* bitmask for page/column order */
#define MADCTL_MX BIT(6) /* bitmask for column address order */
#define MADCTL_MY BIT(7) /* bitmask for page address order */
/**
* init_display() - initialize the display controller
*
* @par: FBTFT parameter object
*
* Most of the commands in this init function set their parameters to the
* same default values which are already in place after the display has been
* powered up. (The main exception to this rule is the pixel format which
* would default to 18 instead of 16 bit per pixel.)
* Nonetheless, this sequence can be used as a template for concrete
* displays which usually need some adjustments.
*
* Return: 0 on success, < 0 if error occurred.
*/
static int init_display(struct fbtft_par *par)
{
par->fbtftops.reset(par);
/* turn off sleep mode */
write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
mdelay(120);
/* set pixel format to RGB-565 */
write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
if (HSD20_IPS)
write_reg(par, PORCTRL, 0x05, 0x05, 0x00, 0x33, 0x33);
else
write_reg(par, PORCTRL, 0x08, 0x08, 0x00, 0x22, 0x22);
/*
* VGH = 13.26V
* VGL = -10.43V
*/
if (HSD20_IPS)
write_reg(par, GCTRL, 0x75);
else
write_reg(par, GCTRL, 0x35);
/*
* VDV and VRH register values come from command write
* (instead of NVM)
*/
write_reg(par, VDVVRHEN, 0x01, 0xFF);
/*
* VAP = 4.1V + (VCOM + VCOM offset + 0.5 * VDV)
* VAN = -4.1V + (VCOM + VCOM offset + 0.5 * VDV)
*/
if (HSD20_IPS)
write_reg(par, VRHS, 0x13);
else
write_reg(par, VRHS, 0x0B);
/* VDV = 0V */
write_reg(par, VDVS, 0x20);
/* VCOM = 0.9V */
if (HSD20_IPS)
write_reg(par, VCOMS, 0x22);
else
write_reg(par, VCOMS, 0x20);
/* VCOM offset = 0V */
write_reg(par, VCMOFSET, 0x20);
/*
* AVDD = 6.8V
* AVCL = -4.8V
* VDS = 2.3V
*/
write_reg(par, PWCTRL1, 0xA4, 0xA1);
write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
if (HSD20_IPS)
write_reg(par, MIPI_DCS_ENTER_INVERT_MODE);
return 0;
// par->fbtftops.reset(par);
// mdelay(50);
// write_reg(par,0x36,0x00);
// write_reg(par,0x3A,0x05);
// write_reg(par,0xB2,0x0C,0x0C,0x00,0x33,0x33);
// write_reg(par,0xB7,0x35);
// write_reg(par,0xBB,0x19);
// write_reg(par,0xC0,0x2C);
// write_reg(par,0xC2,0x01);
// write_reg(par,0xC3,0x12);
// write_reg(par,0xC4,0x20);
// write_reg(par,0xC6,0x0F);
// write_reg(par,0xD0,0xA4,0xA1);
// write_reg(par,0xE0,0xD0,0x04,0x0D,0x11,0x13,0x2B,0x3F,0x54,0x4C,0x18,0x0D,0x0B,0x1F,0x23);
// write_reg(par,0xE1,0xD0,0x04,0x0C,0x11,0x13,0x2C,0x3F,0x44,0x51,0x2F,0x1F,0x1F,0x20,0x23);
// write_reg(par,0x21);
// write_reg(par,0x11);
// mdelay(50);
// write_reg(par,0x29);
// mdelay(200);
// return 0;
}
/**
* set_var() - apply LCD properties like rotation and BGR mode
*
* @par: FBTFT parameter object
*
* Return: 0 on success, < 0 if error occurred.
*/
static int set_var(struct fbtft_par *par)
{
u8 madctl_par = 0;
if (par->bgr)
madctl_par |= MADCTL_BGR;
switch (par->info->var.rotate) {
case 0:
break;
case 90:
madctl_par |= (MADCTL_MV | MADCTL_MY);
break;
case 180:
madctl_par |= (MADCTL_MX | MADCTL_MY);
break;
case 270:
madctl_par |= (MADCTL_MV | MADCTL_MX);
break;
default:
return -EINVAL;
}
write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, madctl_par);
return 0;
}
/**
* set_gamma() - set gamma curves
*
* @par: FBTFT parameter object
* @curves: gamma curves
*
* Before the gamma curves are applied, they are preprocessed with a bitmask
* to ensure syntactically correct input for the display controller.
* This implies that the curves input parameter might be changed by this
* function and that illegal gamma values are auto-corrected and not
* reported as errors.
*
* Return: 0 on success, < 0 if error occurred.
*/
static int set_gamma(struct fbtft_par *par, u32 *curves)
{
int i;
int j;
int c; /* curve index offset */
/*
* Bitmasks for gamma curve command parameters.
* The masks are the same for both positive and negative voltage
* gamma curves.
*/
static const u8 gamma_par_mask[] = {
0xFF, /* V63[3:0], V0[3:0]*/
0x3F, /* V1[5:0] */
0x3F, /* V2[5:0] */
0x1F, /* V4[4:0] */
0x1F, /* V6[4:0] */
0x3F, /* J0[1:0], V13[3:0] */
0x7F, /* V20[6:0] */
0x77, /* V36[2:0], V27[2:0] */
0x7F, /* V43[6:0] */
0x3F, /* J1[1:0], V50[3:0] */
0x1F, /* V57[4:0] */
0x1F, /* V59[4:0] */
0x3F, /* V61[5:0] */
0x3F, /* V62[5:0] */
};
for (i = 0; i < par->gamma.num_curves; i++) {
c = i * par->gamma.num_values;
for (j = 0; j < par->gamma.num_values; j++)
curves[c + j] &= gamma_par_mask[j];
write_reg(par, PVGAMCTRL + i,
curves[c + 0], curves[c + 1], curves[c + 2],
curves[c + 3], curves[c + 4], curves[c + 5],
curves[c + 6], curves[c + 7], curves[c + 8],
curves[c + 9], curves[c + 10], curves[c + 11],
curves[c + 12], curves[c + 13]);
}
return 0;
}
/**
* blank() - blank the display
*
* @par: FBTFT parameter object
* @on: whether to enable or disable blanking the display
*
* Return: 0 on success, < 0 if error occurred.
*/
static int blank(struct fbtft_par *par, bool on)
{
if (on)
write_reg(par, MIPI_DCS_SET_DISPLAY_OFF);
else
write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
return 0;
}
static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
{
// switch(par->info->var.rotate)
// {
// case 0: xs+=53;xe+=53;ys+=40;ye+=40;
// break;
// // case 90: xs+=40;xe+=40;ys+=53;ye+=53;
// case 90: xs+=80;xe+=80;
// break;
// case 180: xs+=53;xe+=53;ys+=40;ye+=40;
// break;
// case 270: xs+=40;xe+=40;ys+=53;ye+=53;
// break;
// default :
// break;
// }
write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
}
static struct fbtft_display display = {
.regwidth = 8,
.width = 240,
.height = 320,
.gamma_num = 2,
.gamma_len = 14,
.gamma = HSD20_IPS_GAMMA,
.fbtftops = {
.init_display = init_display,
.set_addr_win = set_addr_win,
.set_var = set_var,
.set_gamma = set_gamma,
.blank = blank,
},
};
FBTFT_REGISTER_DRIVER(DRVNAME, "sitronix,st7789v", &display);
MODULE_ALIAS("spi:" DRVNAME);
MODULE_ALIAS("platform:" DRVNAME);
MODULE_ALIAS("spi:st7789v");
MODULE_ALIAS("platform:st7789v");
MODULE_DESCRIPTION("FB driver for the ST7789V LCD Controller");
MODULE_AUTHOR("Dennis Menschel");
MODULE_LICENSE("GPL");
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楼主,串口和 USB键盘输入 多终端显示,是怎样 配置成同步的啊
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楼主,串口和 USB键盘输入 多终端显示,是怎样 配置成同步的啊
vi /etc/inittab
将原有的console注释掉,改为ttyS0和tty0,ttyS0是USB键盘输入,tty0就是正常输出输入
#console::respawn:-/bin/sh
ttyS0::respawn:-/bin/sh
tty0::respawn:-/bin/sh
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请问怎么初始化lcd的?
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请问io硬件连接是怎样的,连接到v3s的spi吗
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请问io硬件连接是怎样的,连接到v3s的spi吗
是的
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请问怎么初始化lcd的?
改内核改设备树
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树莓学LINUX 说:请问io硬件连接是怎样的,连接到v3s的spi吗
是的
请问我可不可以用荔枝派zero连接外部的tf屏幕做测试
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资本家大善人 说:树莓学LINUX 说:请问io硬件连接是怎样的,连接到v3s的spi吗
是的
请问我可不可以用荔枝派zero连接外部的tf屏幕做测试
可以
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请问已经按照您的教程操作了,可是用官方教程的buildroot-2017.08.01编译出来的根文件系统,开机以后就是白屏,我又使用别人的已经编译成功的Debian根文件系统,开机之后可以正常显示,请问这是什么原因?难道在根文件系统中也要进行设置吗?
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@树莓学LINUX
印象里好像不用,只设置了个控制台,7楼
这个很详细
https://blog.csdn.net/qq_28877125/article/details/120007416
最近编辑记录 资本家大善人 (2021-11-19 01:18:54)
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@树莓学LINUX
印象里好像不用,只设置了个控制台,7楼
这个很详细
https://blog.csdn.net/qq_28877125/article/details/120007416
尝试了很多次,使用自己编译的根文件系统不能显示,直接白屏,使用别人的根文件系统就可以正常显示,我哭了
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@树莓学LINUX
印象里好像不用,只设置了个控制台,7楼
这个很详细
https://blog.csdn.net/qq_28877125/article/details/120007416
开启双端显示后 屏幕能正常显示了 难道在使用串口的时候 屏幕默认不显示吗
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资本家大善人 说:@树莓学LINUX
印象里好像不用,只设置了个控制台,7楼
这个很详细
https://blog.csdn.net/qq_28877125/article/details/120007416开启双端显示后 屏幕能正常显示了 难道在使用串口的时候 屏幕默认不显示吗
能的,双端显示,双端控制
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楼主你的内核配置config文件可以看看吗?我们的屏幕应该是同一个,但是我的屏幕显示是反色
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请问初始化LCD到底应该在u-boot还是linux kernel里修改,具体在哪修改
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请问初始化LCD到底应该在u-boot还是linux kernel里修改,具体在哪修改
在内核里面
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谢谢,请问除了linux/drivers/staging/fbtft/里的需要修改,还有哪需要修改呢
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设备树节点SPI0和flash启动的spi0的节点是不是重合的啊
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@资本家大善人
vi /etc/inittab
将原有的console注释掉,改为ttyS0和tty0,ttyS0是USB键盘输入,tty0就是正常输出输入
#console::respawn:-/bin/sh
ttyS0::respawn:-/bin/sh
tty0::respawn:-/bin/sh
如下配置屏幕显示了内核启动的log但是,控制串口终端的时候为什么屏幕就不同步了,就一直显示log,重启也只是显示log?
还是说这个只是单独的两个,那这么操作可以让电脑键盘输入,然后在控制台和屏幕同时显示呢?
# vi /etc/inittab
# /etc/inittab
#
# Copyright (C) 2001 Erik Andersen <andersen@codepoet.org>
#
# Note: BusyBox init doesn't support runlevels. The runlevels field is
# completely ignored by BusyBox init. If you want runlevels, use
# sysvinit.
#
# Format for each entry: <id>:<runlevels>:<action>:<process>
#
# id == tty to run on, or empty for /dev/console
# runlevels == ignored
# action == one of sysinit, respawn, askfirst, wait, and once
# process == program to run
# Startup the system
::sysinit:/bin/mount -t proc proc /proc
::sysinit:/bin/mount -o remount,rw /
::sysinit:/bin/mkdir -p /dev/pts
::sysinit:/bin/mkdir -p /dev/shm
::sysinit:/bin/mount -a
::sysinit:/bin/hostname -F /etc/hostname
# now run any rc scripts
::sysinit:/etc/init.d/rcS
# Put a getty on the serial port
#console::respawn:/sbin/getty -L console 0 vt100 # GENERIC_SERIAL
ttyS0::respawn:-/bin/sh
tty0::respawn:-/bin/sh
# Stuff to do for the 3-finger salute
#::ctrlaltdel:/sbin/reboot
# Stuff to do before rebooting
::shutdown:/etc/init.d/rcK
::shutdown:/sbin/swapoff -a
::shutdown:/bin/umount -a -r
最近编辑记录 stutian (2022-04-12 08:28:03)
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顺便问一下,那个字体大小怎么改,找不大地方:)
fbtft上终端的字体大小怎么改???
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